[root:~#] du -hxs /
[root:~#] df -hxs /
Filesystem Size Used Avail Use% Mounted on
/dev/hdd6 21G 6.6G 14G 33% /
[root:~#] fdisk -l | grep hdd6
Device Boot Start End Blocks Id System
/dev/hdd6 62444 93665 15735636 83 Linux
My calculations tell me that the Blocks number tells me /dev/hdd6 is 15GB in size, which is consistent with what I remember having partitioned it to be. GParted also reports what fdisk is telling me.
Interesting gparted and df are reporting the same free space. I've also included what is reported by a SuperKaramba theme for the / partition. I just assume that is using the output of df and du.